Waste would be stored in underground vaults at a depth of between 200m (656ft) and 1,000m (3,280ft) and there would be some buildings on the surface.

The Department of Energy and Climate Change said that over the 100-year lifetime of the £12bn facility an average of 550 workers would be employed on construction.

This would peak at 1,000 workers in the busiest times.

Currently, radioactive waste is stored above ground in various "long-term temporary" sites around the UK, mostly at Sellafield.

In its final report, the West Cumbria Managing Radioactive Waste Safely (MRWS) Partnership - set up to coordinate discussions - said there could be "positive and negative impacts".

Concerns include the noise and traffic caused by construction and possible effects on landscape, tourism, investment and jobs, the report said.

But the partnership said: "Our overall opinion is that, at this stage, we are fairly confident that an acceptable process can be put in place to assess and mitigate negative impacts, and maximise positive impacts."

Benefits and positive opinion

The waste needs to go somewhere and Cumbria was the only area still considering an underground storage facility.

Timeline highlights

March 2009 - West Cumbria Managing Radioactive Waste Safely (MRWS) Partnership is formed by Copeland and Allerdale Borough Councils and Cumbria County Council.

November 2009 - MRWS starts to inform residents about government plans to store radioactive waste underground.

March 2010 - a public meeting is held to discuss the possibilities.

June 2010 - a geological survey starts to assess which areas are unsuitable.

November 2010 - people are again asked for their views but West Cumbria Friends of the Earth, describes the consultation as "tokenistic."

September 2011 - MRWS members visit a research facility in France to find out about geological disposal in other countries.

November 2011 - a four-month consultation starts.

Feb 2012 - a study is published looking at how to counter bad publicity created by the research.

May 2012 - the results of an Ipsos Mori poll suggest a majority is in favour of considering hosting the facility. In Copeland, which covers Sellafield, 68% of people backed entering formal talks with government. Across Cumbria as a whole, 53% were in favour and 33% opposed.

July 2012 - MRWS publishes its final report. It says a suitable rock formation that could act as an effective barrier would be essential for the construction of a safe disposal facility.

October 2012 - The three councils ask the government for more time and further information before deciding whether to allow detailed studies and investigations to take place.

January 2013 - that decision was made.

Dungeness in Kent, who had initially shown interest, withdrew at the end of 2012 in the face of opposition from residents.

The government, keen to attract volunteers, rather than impose the proposal on an unwilling area, had promised certain benefits, such as money for transport, public service infrastructure and housing, for any council which agreed to accept the storage facility.

Advocates of the plans say it would have protected, and created, nuclear industry jobs, with more than 9,000 people already working at Sellafield.

He stressed the "investment package" must be suitable, the final decision must "rest with a local referendum not politicians" and unsuitable geology would put paid to the whole scheme.

Lynn Berger, who runs the Woolpack Inn near Boot in the Eskdale Valley, is more concerned about the effect of "scaremongering" on tourism than the facility itself.

"It's not going to make any difference to us from a radiation point of view," she said.

"And, if anything, everything is so much more controlled because it [Sellafield] is there. The house isn't going to fall down, we're not going to bash a hole in the cellar wall and find the beer turns green."

John Rowlands, of Romar Innovate in Whitehaven, is also positive: "We've had waste stores at Sellafield before and it hasn't affected the industry.

"The nuclear industry has worked alongside tourism for as long as I can remember."

Arguments against

There are concerns about safety and, particularly, the perception of safety among tourists and investors.

Critics are also concerned about visual damage to the landscape and the effect on farming.

Some point out any research is pointlessly going over old ground, citing a plan by Nirex, the agency then responsible for the disposal of nuclear waste, to build an underground waste laboratory in the 1990s which was scrapped after a planning inspector ruled the area's geology made it unsafe.

Image caption
Geologists disagree over which parts of Cumbria might be suitable

Former Nirex inspector, Chris McDonald, has said he was "very surprised" West Cumbria was again being suggested as a potential site and "the probability of their finding a suitable site is low".

The Lake District National Park Authority has already told the government that a repository "would not be in the long-term interests of the Lake District" and would risk the area's "brand image".

Its chairman, Bill Jefferson, has said the effects on the landscape and tourism could be disastrous and that tourism brings more income to the area than the nuclear industry.

Campaigner Harry Marsland, from Keswick, has said a "nuclear dump will do significant damage" to the area's image.

"In Cumbria tourism is worth £2bn per annum, and employs 56,000 people directly, plus it provides the work for countless trades people, suppliers and retailers. Let's be clear, it depends upon the Lake District," he said.

What next?

Cumbria County Council, Copeland Borough Council and Allerdale Borough Council had to decide whether to move to the next stage of a process that is still decades away from completion, even if it had been approved.

They had sought further assurances from the government, including clarification on when, exactly, they could legally withdraw from the process should they want to.